<?php
require_once 'core/Debug.php';
require_once 'core/config_.php';//System Config...
require_once ROOT_PATH . 'core/CGlobal.php';
require_once ROOT_PATH . 'core/DB.php';

if(SESSION_TYPE == 'db'){
	//Session db store
	require_once ROOT_PATH.'includes/session.class.php';
}
elseif(SESSION_TYPE == 'memcache'){
	//Session memcache store
	require_once(ROOT_PATH."includes/session.memcache.php");	
}
else{		
	session_start(); 
}
	
/*
global $in_img;
$in_img=1;

$im 		= ImageCreate(50, 20);  
$white 		= ImageColorAllocate($im, 255, 255, 255); 
$black 		= ImageColorAllocate($im, 0, 0, 0); 

$alphanum	= "abcdefghiklmopqrstuvwxyz0123456789";
$new_string	= substr(str_shuffle($alphanum), 0, 3);

header("Content-type: image/png");

ImageFill($im, 0, 0, $black);
ImageString($im, 5, 12, 2, $new_string, $white); 



$_SESSION["ecore_validate"] = $new_string;

ImagePNG($im); 
ImageDestroy($im); 
*/

class CaptchaSecurityImages {

	var $font = 'monofont.ttf';

	function generateCode($characters) {
		/* list all possible characters, similar looking characters and vowels have been removed */
		$possible = '23456789bcdfghjkmnpqrstvwxyz';
		$code = '';
		$i = 0;
		while ($i < $characters) { 
			$code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
			$i++;
		}
		return $code;
	}

	function CaptchaSecurityImages($width='60',$height='30',$characters='3') {
		$code = $this->generateCode($characters);
		/* font size will be 75% of the image height */
		$font_size = $height * 0.75;
		$image = @imagecreate($width, $height) or die('Cannot initialize new GD image stream');
		/* set the colours */
		$background_color = imagecolorallocate($image, 255, 255, 255);
		$text_color = imagecolorallocate($image, 20, 40, 100);
		$noise_color = imagecolorallocate($image, 100, 120, 180);
		/* generate random dots in background */
		for( $i=0; $i<($width*$height)/3; $i++ ) {
			imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
		}
		/* generate random lines in background */
		for( $i=0; $i<($width*$height)/150; $i++ ) {
			imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
		}
		/* create textbox and add text */
		$textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function');
		$x = ($width - $textbox[4])/2;
		$y = ($height - $textbox[5])/2;
		imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function');
		/* output captcha image to browser */
		header('Content-Type: image/jpeg');
		imagejpeg($image);
		imagedestroy($image);
		$_SESSION['ecore_validate'] = $code;
	}

}

$captcha = new CaptchaSecurityImages();

?>